QUOTE(инженер_Гарин @ 19.4.2015, 15:26)

Вопрос ко всем. Какая авария (назовем это так условно) на установках советского дизайна ВВЭР, из известных на сегодняшний день, может считаться самой "тяжелой" (тоже условно)?
В тему. МАГАТЭ про Колу вспомнило.
QUOTE
KOLA, RUSSIAN FEDERATION, 1994
Prior to the event all four units of Kola NPP were in normal operation at the following power levels:
Unit 1 - 370 MW(e), Unit 2 – 290 MW(e), Unit 3 - 350 MW(e), Unit 4 - MW(e). Safety systems were in hot standby.
Due to the hurricane wind the Kolenergo grid system collapsed, and the 330 kV, 154 kV, and 110 kV high voltage transmission lines were damaged.
Spiked voltage oscillations in the NPP unit auxiliary power line resulted in trips of the turbine generators and other main equipment and reactor scrams.
An attempt to supply power to Unit 1 and 2 (WWER-440, V-230 designs) equipment by emergency
connections from diesel generators was unsuccessful due to diesel generators failure for the following
reasons: Deficiencies in diesel generator control design configuration and deficiencies of work
planning and organization by NPP management as regards timely changes of diesel generators control
design configuration and ensuring emergency power supply to essential equipment. Total blackout of
these units was accompanied by breach of safe operation limits and conditions.
Safety systems at Units 3 and 4 (WWER-440, V-213 designs) are configured as three channels with
independent power supplies, service water supplies, compressed air supplies, etc. For this reason total
LOOP conditions at Units 3 and 4 passed without serious criticism.